254
parameter to operation panel
Download fault of parameter from
operation panel to the driver
Check wiring of operation panel
Parameter download without
upload in advance
Upload parameters first, then download
E-24
PID feedback
disconnecting
PID feedback wire is loosen
Check feedback wiring
Feedback value lower than
disconnection detection value
Adjust detection input threshold
E-25
Voltage feedback
disconnecting
Feedback value lower than
disconnection detection value
Adjust detection input threshold
E-26
Arrival of operation
limit time
Arrival of operation limit time
Seek help from agent
E-27
Co-processor
communication fault
reserved
reserved
E-28
Encoder disconnecting
reserved
reserved
E-29
Large deviation of
speed
reserved
reserved
E-30
Overspeed fault
reserved
reserved
6.2 Abnormal Phenomena Solution
During the driver operation, the common abnormal phenomena and solving actions are as showed in Table 6-2.
Table 6-2 Common Abnormal Phenomena and Counteractions
Phenomena
Possible reasons of fault and actions to take